infructuos.e ADJ 1 1 VOC S M POS
infructuosus, infructuosa, infructuosum ADJ [XXXEC] uncommon
unfruitful, unproductive;
e SUFFIX
-ly; -ily; Converting ADJ to ADV
infructuos.e ADV POS
infructuosus, infructuosa, infructuosum ADJ [XXXEC] uncommon
unfruitful, unproductive;

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This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.